Rim-burring machine



Dec. 9,- 1924.

J. c. THEBER'ATH RIM BURRING MACHINE Filed May l0, 1922 5 Sheets-Sheet l Dec. 9, 1924. 1,518,283 J. C. THEBERATH RIM BURRING MACHINE Filed May lO, 1922 3 Sheets-Sheet P I/vveNv-on.

Den.' 9, 1924.

J. c. THEBl-:RATH

RIM BURRING MACHIIIE Filed May 10! 192g 5 Shee'crs-Sheerl 5 Patented Dec. 9, 1924.

UNITED STATES PATENT OFFICE.

JOSEPH C. THEBERATH, F CLEVELAND, OHIO, ASSGNO'R, BY MESNE ASSIGNMENTS, TO GENERAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE.

Application led May 10,

To all whom it may concern.'

Be it known that I, JOSEPH C. THE- BERATH, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, State of Ohio, have invented certain new and useful Improvements in Rim-Burring Machines, of which the following is a specification.

This invention relates to machines for sizing the flanges of rims for pneumatic tires of the so-called clincher type.

One of the objects of the invention is t0 provide a machine which will accurately shape the flanges of the rim and also trim oft' any burrs or objectionable roughnesses.

A further object of the invention is to provide a machine which mav be set into operation by the movement of a trcadle or lever and which will automatically go thru the operation of shaping the flanges and trimm-ing them, without further attention of the operator, and at the completion of the operation, will automatically stop and release the rim.

A further object of the invention is to provide a machine of the class referred to which will be comparativelv simple in design and in operation and which will be inexpensive to manufacture.`

Other objects and the features of novelty will be apparent from the following description taken in Connection with the accompanying drawings, of which:

Figure 1 is a plan view of a machine embody-ing my invention;

Fig. 2 is a side elevation of the same;

Fig. 3 is an enlarged vertical section thru the machine on the line 3-3 of Fig. 1:

Fig. 4 is a vertical section on the line 4--4 of Fig. 3;

Fig. 5 is an enlarged fragmentary elevation of the machine as seen from the plane on the line 5 5 of Fig. 2:

Fig. 6 is a detailed plan of the clutch actuating mechanism appearing in the other views;

Fig. 7 is a detail view similar to Fig. 6, but showing the parts in a different relation; and

Fig. 8 is a transverse section of a rim of the type on which the machine is designed to operate.

Referring to the drawings, 10 indicates the base of the machine on which there is secured the frame 1 1 which carries the main 1922. Serial N'o. 559,969.

operating elements. A shaft 12 is supported in the frame 11 and carries at one end the driving pulley 13 and at the other end the roll 14 (see Fig. 3) which operates on the interior of the rim. The shaft 12 is supported in the fixed bearings 15 and 16 and carries, between these bearings, the worm 17 and the spur pinion 18. The worm 17 meshes with and actuates the worm gear 19 which is secured to the vertical shaft 20, this shaft being mounted in bearings 21 and 22 in the frame 11. A bevel gear 23 is secured on the upper end of the shaft and meshes with a corresponding gear 24 on the end of a horizontal shaft 25 which is arranged 'at right angles to the shaft 12. The shaft 25 is mounted in the bearings 26 and 27 on the frame 11 yand carries a'cam 28 and a clutch member 29, which are preferably formed in one piece and loosely mounted on the shaft 25. A rocker arm 30 is mounted on a shaft 31 which is arranged parallel to the'shaft 25 and supported in a bearing 32 which is mounted on the upright 33 ofthe frame 11. The rocker arm carries, at one end, a roller 34 which cooperates with the cam v28 and, at its other end, carries an adjustable pressure block 35, this block fitting in asocketin the arm 30 and being backed up by a screw 37 which is adjustable in the arm 30 and is locked in position by a nut `37. The underside of the block 35 is hollowed, out to receive the Curved upper end of an abutment 38 which is formed integral with the plate 39, the latter being connected with the bearing 40 by means of screws 41, on which the plate has a slight vertical movement, as shown in Fig. 3. The bearing 40 has a chamber to receive the spring 42 which presses upwardly on the plate 39. The bearing 40 carries one end of a shaft 43, the other end of this shaft being supported in a bearing block 44 arranged between the uprights 45, this bearing block having trunnions 46 which are mounted in ears 47 on the uprights so as to allow a swingingA movement of the bearing block with the shaft 43. The shaft 43 carries a roll 48 (see Fig. 3), which cooperates with roll 14 to shape the. flanges of the rim.

The shaft 43 also carries a spur gear 49 which meshes with the gear 18 on the shaft 12 and is driven thereby. It will be noted from Fig. 3 that the trunnions 46 are sub'- stantially in alignment with one edge of the gear 49 so that the vertical rocking movement of the shaft 43 will not materially disturb the meshing of the gears 18 and 49.

The bearing block 40 slides vertically between the uprights 33 and 50, and springs 51, having their upper ends connected with brackets 52, have their lower ends connect ed with bolts 53 on the block 4'() and exert an upward pull upon this block for the purpose of separating the rolls 14 and 48, as will be'hereinafter described. y

A clutch member 54, slidably mounted on the shaft 25, has a feather-key connection therewith so as to be driven thereby, the jaws of this clutch member being adapted to intermesh with jaws of the member 29 and thereby connect the clutch member 29 and the cam 28 with the shaft 25. A lever 55, having a yokeat its upper end which cooperates with the clutch member 54, in the usual manner, for shifting the latter, has its lower end pivoted at 56. A spring 57, surrounding the shaft 25, bears upon the collar 58V on this shaft and on the clutch member 54 andftends, at all times, to force the mem ber 54 into engagement with the member 29. n A bell crank lever 59 is pivotally mounted on a bolt 60, which is carried by the lever 55, the horizontal arm of this bell crank lever having connected therewith a vertically extending rod 61 which has its lower end connected with a treadle 62, this treadle being pivotally mounted, at 63, on the base 10. The vertical arm of the bell lcrank lever 59 has its upper end notched, as indicated at 64, thereby forming a sort of cam which cooperates with the notched portion 65 of the horizontal lever 66. The lever 66 is pivoted at 67 on a bracket 68. Y

The clutch member 29 carries on its periphery a cam roller 69 which, as will be seenl from Fig. 4, is adapted to engage the lever 66 and force the free endof the latter, together with the levers 59 and 55, to the left and thereby disengage the clutch members 29 and 54 and stopt-he rotation of the member 29. It will be observed from Fig. 6 that the free end of the lever 66 is rounded to -receive the roller 69. When this occurs the relation of the portions 64 and 65 of the levers 59 and 66, respectively, is as indicated mFig. 7, the upright arm of the lever 59 being moved toward the right by a spring 70 and also by a spring 71, the lat-ter being arranged between the treadle 62 and the strut 72 which will be hereinafter described, and tending, at all times, to lift the treadle 62. The spring 70 has its upper end connected with a bracket 7 3 and its lower end connected with the upper end of the rod 61.

The upright 33 of the frame 11 carries a bracket 74/which carries, at its upper end, the pivot bolt 75 on which is mounted the lever 76. A bolt 77 loosely connects the lower end of the lever 76 with a horizontally arranged tool holder 78 which is pivoted at 79 on a bracket 8O on the frame 11. `A spring 81 (see Fig. 2) is arranged on the bolt 77 between the lever 76 and. the tool holder 78. A cutting tool 82 is carried on the free end of the holder 78 and is adapted to engage the flange of the rim R and remove therefrom any burrs. The spring 8l serves to yieldingly hold the tool 82 against the flange of the rim R so as to accommodate any inaccuracies in the rim.

Y The lever 76 carries a cam plate 83 with which a cam 84 on the shaft 31 cooperates. The cam 84 has a slight rocking movement with the lever 3() and from Fig. 2 it will be apparent how the cam 84 cooperates with the plate 83 to actuate the lever 76 and the tool 78.

From Fig. 3 it will be seen that the cam 28 is shaped to actuate the lever 30 and hold the latter with the rolls 14 and 48 in the position indicated during substantially a half revolution of the shaft 25. On account of the comparatively slow revolution of the shaft 25 as compared with the shaft 12, due to the speed reduction effected by the worm 17 and gear 19, the shaft 12 will make several revolutions while the shaft 25 is making a half revolution. The parts are so proportioned that the rolls 14 and 48, when they are in the position shown in Fig. 3, will rotate the rim R approximately two revolutions while the cam 28 is making a half revolution. This causes the rolls 14 and 48 and the tool 78 to operate on the rim for two revolutions of the latter which, it has been found by experience, is sufficient to accurately shape the flange of the rim and also trim off any projecting burrs.

lVhen the rim has made two revolutions the roller 69 will engage with the end of the lever 66 and disconnect the clutch inembers 29 and 54, the cooperatingl portions 64 and 65 of the levers 59 and 66 then being in the relation indicated in Fig. 7. lith the parts thus stopped the spring 51 will lift the block 40 and the shaft 43 to separate the rolls 14 and 48 and permit the removal of the rim or its reversal to have the opposite flange thereof operated upon. lith the parts in the position just described. if the treadle 62 is depressed, the upper end of the lever 59 will be dra-wn toward the left in Figs. 6 and 7 and permit the spring 57 to again force the clutch members into engagement thereby repeating the operation. A stop pin 85 is arranged on the bracket 68 to limit the movement of the lever 66 away from the lever 59.

A table 86 is pivotally mounted at 87 on the frame 11 and carries horizontal rollers 88 which support the rim and the vertical rollers 89 which hold the rim against lateral displacement. An adjustable strut or brace 72 supports the outer end of the table 86 and by varying the length of this st-rut, by means of the turnbuclrle 90, the angular relation of the table 86 to the rolls le and 48 may be varied to regulate the action of the rolls 14 and I8 on the flanges of the rim.

lWhile I have illustrated and described what I consider to be the preferred form of my invention, it will be understood that various changes may be made in the details of construction Without departing from the spirit of the invention which is defined in the appended claims.

I-Iaving thus described my invention, What I claim is:

l. In a machine of the class described, the combination vof a pair of rolls for operating` on the article, driving means, means for forcing said rolls together to operate on the article, means for separating said rolls to release the article, means for operatively connecting the second-mentioned means With the driving means, a cutting tool for operating on the article, and means for moving said cutting tool into position to operate on the article in timed relation to the operation of the second mentioned means.

2. In a machine of the class described, the combination of a pair of rolls for operating on the article, driving means, cam means for forcing said rolls together to operate on the article, a cutting tool for operating on the article, and cam means moving in timed relation to the first-mentioned cam means for moving said cutting tool into position to operate on the article.

3. In a machine of the class described, the combination of a pair of rolls for operating on the article, driving means, cam means for forcing said rolls together to operate on the article, means for operatively connecting said cam means With said driving means, and automatically operating` means for disconnecting said cam means from said driving means.

t. In a machine of the class described, the

, combination of a pair of rolls for operating on the article, driving means, cam means for forcing said rolls together to operate on the article, a clutch for operatively connecting said cam means With said driving means, a manually operable cam for non mally maintaining said clutch in inoperative position, spring means for returning` said manually operable cam to its normal position after operation thereof, and automatically operable means for disconnectino` said clutch after a predetermined operation of the first mentioned cam means.

5. In a machine of the class described, the combination of a pair of rolls for operating on the article, driving` means, cam means for forcing said rolls together to operate on the article, a clutch for operatively connecting said cam means with said driving means, a shifter device for actuating said clutch, a manually operable cam on said shifter device, a cam lever With which the last-mentioned cam cooperates, and means moving with the first-mentioned cam adapted to engage With said cam lever and actuate the latter to disconnect said clutch after a predetermined operation ofthe first-mentioned cam means.

6. In a machine of the class described, the combination of a pair of rolls for operating on the article, a swinging table for supporting the article While being operated upon by said rolls, a pair of pivotal supports the common axis of vvhich extends transverse to the axes of rotation of said rolls, and is disposed adjacent and beneath said axes, and means for adjusting the position of said table to vary the relation of the article to said rolls.

7. In a machine of the class described, the combination of a pair of rolls for operating on the article, a swinging table for supporting the article While being operated upon by said rolls, said Y table being normally arranged to support the article in a plane substantially parallel With the axes of said rolls, means for pivotally supporting said table adjacent and in a position beneath and substantially in a vertical plane passing through said rolls, and adjustable supporting means for said table whereby the relation of the article to said rolls may be varied.

In testimony whereof I aiiiX my signature.

JOSEPH C. THEBERATI-I. 

